Comparison

LSTclock vs MahjongScore

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

LSTclock

This utility app displays local sidereal time for registered locations on iOS, iPadOS, and watchOS. It can also calculate sidereal time and Julian Date for any date and time, and sync locations between devices.

Highlights
  • Local sidereal time display
  • Julian Date calculation
  • Supports multiple registered locations
  • Location sync between iPhone and Apple Watch
  • Date and time specific calculations
Features
Read full description

LSTclock is an iOS/iPadOS/watchOS app that displays the local sidereal time (LST) at registered location(s). On iOS/iPadOS, it can also calculate LST and Julian Date for any date and time. The list of locations can be synced between iPhone and paired Apple Watch(es).

About

MahjongScore

Features
Read full description

麻雀スコアは、仲間内のセット麻雀の成績を記録・集計するためのスコア管理アプリです。 素点を入力するだけで、面倒な計算はすべて自動。対局中はゲームに集中できます。 ■ こんな方におすすめ ・仲間内のセット麻雀の成績を紙やメモアプリで管理している ・ウマ・オカの計算や精算で毎回もめる、時間がかかる ・自分の成績や収支の推移をちゃんと振り返りたい ■ 主な機能 【かんたんスコア入力】 半荘ごとに素点を入力するだけで、順位点(ウマ)・オカ・チップを含むスコアを自動計算。 同点時の着順選択や2位のクビなど、細かいルールにも対応しています。 最後の1人の素点は自動入力。合計チェック付きで入力ミスも防げます。 【ルールを自由にカスタマイズ】 順位点・持ち点・返し点・換算倍率・チップをルールとして保存し、いつもの卓ですぐ再利用できます。4人麻雀・3人麻雀の両方に対応。 【精算もおまかせ】 対局が終わったら、「誰が誰にいくら」を自動で算出。複数ゲームをまとめて精算することもできます。 【成績・収支の見える化】 ホーム画面で月間・年間・全期間の収支をグラフとカレンダーで表示。 平均着順・着順分布・スコア内訳(素点/順位点/チップ)も、総合・4麻・3麻それぞれで確認できます。 【友達と成績を共有】 ユーザーコードで友達を追加すると、同じ対局の記録が友達の履歴にも反映。 友達ごとの対戦成績(勝敗・スコア・収支)も自動で集計されます。 【途中保存で安心】 対局の途中でも一時保存OK。下書きから再開できるので、長いセットでも記録が途切れません。 ―――――――――― Terms of Use: https://okadataisei234.github.io/mahjongscore-legal/terms-of-service.html Privacy Policy: https://okadataisei234.github.io/mahjongscore-legal/privacy-policy.html

Screenshots

LSTclock4 screens
MahjongScore4 screens

Verdict

The call

The clearest difference is in-app purchases: LSTclock at none against MahjongScore's 1. LSTclock also leads on ads (none vs shown). MahjongScore's advantage is update cadence (every 5 days vs every 2 months) and iOS requirement (15.1 vs 18.0). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. MahjongScore sells 1 in-app purchase, starting at $0.99 per month. LSTclock asks for nothing beyond the download.

UpkeepUpdate frequency

LSTclock ships an update every 2 months, MahjongScore every 5 days. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.

Scorecard4 real differences · 6 level
LSTclock versus MahjongScore: the parameters behind the verdict, then further details
ParameterLSTclockMahjongScore
PriceFreeFree
Rating3.8 (10 ratings) — better—
Positive reviews54.5% of reviews—
Number of ratings10 — better—
Update frequencyEvery 2 monthsEvery 5 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.015.1 — better
Further details — not scored
Size22 MB42 MB
Age rating4+17+
DeveloperTsuyoshi SawadaTAISEI OKADA

In-app purchases

None

LSTclock

No in-app purchases

1 purchases

MahjongScore

Subscriptions1
  • プレミアム(月額)$0.991 Month

Questions

Is LSTclock free?
LSTclock is free to download, with no in-app purchases.
Is MahjongScore free?
MahjongScore is free to download, with in-app purchases available.
Do LSTclock or MahjongScore have ads?
MahjongScore shows ads; LSTclock does not.
Which is updated more often, LSTclock or MahjongScore?
LSTclock ships an update every 2 months, and MahjongScore every 5 days. Most recently, LSTclock was updated on October 24, 2026 and MahjongScore on October 8, 2026.

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